Tyre Building Vision System Residue Detection
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Solution Overview
Problem
Current artificial vision/detection systems in the tyre building process face challenges in accurately detecting residues of service fabric and adhesive tape due to limited resolution in setting the second threshold for foreign bodies, leading to either undetected defects or false notifications, which can impair tyre quality and increase production costs.
Innovation Solution
The method involves dividing digital images of semifinished products into sub-parts to increase the resolution of the second threshold, using a first and second linear scale of brightness values to define thresholds, and employing dark-colored background walls for improved contrast and accurate detection of residues, thereby enhancing the precision of foreign body and defect identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the second threshold for foreign body detection is set with limited resolution, then the detection system is simpler to operate, but detection accuracy decreases leading to undetected defects or false notifications
Solution Approach 1:
The patent divides the image into multiple sub-parts and processes each sub-part separately to determine operative parameters. This segmentation allows for more precise threshold setting in each region, improving overall detection accuracy without requiring a single complex global threshold system
Solution Approach 2:
The patent introduces a hierarchical dimension to the detection process by first dividing images into sub-parts, then further analyzing portions within each sub-part. This multi-level approach effectively increases the resolution of threshold setting by adding a dimensional layer of analysis
2Measurement precision
If digital images are divided into sub-parts for higher resolution threshold setting, then detection accuracy improves, but processing complexity increases
Solution Approach 1:
The image is segmented into multiple sub-parts, and each sub-part is further divided into portions for analysis. This systematic segmentation enables high-resolution threshold setting by allowing different operative parameters to be determined for different regions, improving detection precision while maintaining structured processing
Solution Approach 2:
The patent applies different operative parameters and threshold criteria to different sub-parts and portions of the image based on local characteristics. This local quality approach allows the system to adapt to varying conditions in different regions, improving overall detection accuracy through localized analysis
3Reliability
If dark-colored background walls are used to improve contrast, then detection reliability improves, but the apparatus complexity increases
Solution Approach 1:
The patent uses dark-colored background walls to create high contrast with the semifinished product and potential foreign bodies. This color contrast enhancement improves the reliability of optical detection by making residues and defects more visually distinct from the background and the product surface
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for reliable and accurate identification of residues and foreign bodies, reducing the number of defective tyres and improving production efficiency by minimizing false notifications and ensuring high-quality tyre production.
Implementation Method 1
at least one first detection device (110) for detecting at least one first image (A) representative of the semifinished product (10)
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
Method to control manufacturing and feeding of semifinished products in a tyre building process, said method comprising: detecting at least one first image (A) representative of a semifinished product (10); dividing said at least one first image (A) into a plurality of first sub-parts (ZA1-ZAn), wherein each one of said first sub-parts (ZA1-ZAn) is composed of a plurality of first portions (A1, A2), each one associated with a respective brightness value; defining a first threshold (TH1) for said brightness values; making a first comparison between the brightness values of said first portions (A1, A2) and said first threshold (TH1); as a function of said first comparison, determining for each one of said first sub-parts (ZA1-ZAn) a first operative parameter (PA1-PAn) representative of a total area occupied in each first sub-part (ZA1-ZAn) by the first portions (A1) associated with a brightness value smaller or greater than said first threshold (TH1); making a second comparison between each one of said first operative parameters (PA1-PAn) and a second threshold (TH2); causing the generation of a first notification signal (NS1) as a function of said second comparison. An apparatus to control manufacturing and feeding of semifinished products in a tyre building process is also described.